EP3661453B1 - Amortisseur de vibration ajustable pour appareil de soins personnels - Google Patents

Amortisseur de vibration ajustable pour appareil de soins personnels

Info

Publication number
EP3661453B1
EP3661453B1 EP18749319.2A EP18749319A EP3661453B1 EP 3661453 B1 EP3661453 B1 EP 3661453B1 EP 18749319 A EP18749319 A EP 18749319A EP 3661453 B1 EP3661453 B1 EP 3661453B1
Authority
EP
European Patent Office
Prior art keywords
component
vibration reduction
personal care
reduction assembly
care device
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Active
Application number
EP18749319.2A
Other languages
German (de)
English (en)
Other versions
EP3661453A1 (fr
EP3661453C0 (fr
Inventor
Franciscus Jozef Bosman
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Koninklijke Philips NV
Original Assignee
Koninklijke Philips NV
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Koninklijke Philips NV filed Critical Koninklijke Philips NV
Publication of EP3661453A1 publication Critical patent/EP3661453A1/fr
Application granted granted Critical
Publication of EP3661453B1 publication Critical patent/EP3661453B1/fr
Publication of EP3661453C0 publication Critical patent/EP3661453C0/fr
Active legal-status Critical Current
Anticipated expiration legal-status Critical

Links

Classifications

    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
    • F16F—SPRINGS; SHOCK-ABSORBERS; MEANS FOR DAMPING VIBRATION
    • F16F15/00—Suppression of vibrations in systems; Means or arrangements for avoiding or reducing out-of-balance forces, e.g. due to motion
    • F16F15/02—Suppression of vibrations of non-rotating, e.g. reciprocating systems; Suppression of vibrations of rotating systems by use of members not moving with the rotating systems
    • F16F15/03—Suppression of vibrations of non-rotating, e.g. reciprocating systems; Suppression of vibrations of rotating systems by use of members not moving with the rotating systems using magnetic or electromagnetic means
    • A—HUMAN NECESSITIES
    • A46—BRUSHWARE
    • A46B—BRUSHES
    • A46B13/00—Brushes with driven brush bodies or carriers
    • A46B13/02—Brushes with driven brush bodies or carriers power-driven carriers
    • A46B13/023—Brushes with driven brush bodies or carriers power-driven carriers with means for inducing vibration to the bristles
    • A—HUMAN NECESSITIES
    • A46—BRUSHWARE
    • A46B—BRUSHES
    • A46B15/00—Other brushes; Brushes with additional arrangements
    • A46B15/0002—Arrangements for enhancing monitoring or controlling the brushing process
    • A46B15/0016—Arrangements for enhancing monitoring or controlling the brushing process with enhancing means
    • A46B15/0026—Arrangements for enhancing monitoring or controlling the brushing process with enhancing means with a magnetic means
    • A—HUMAN NECESSITIES
    • A46—BRUSHWARE
    • A46B—BRUSHES
    • A46B9/00—Arrangements of the bristles in the brush body
    • A46B9/02—Position or arrangement of bristles in relation to surface of the brush body, e.g. inclined, in rows, in groups
    • A46B9/04—Arranged like in or for toothbrushes
    • A—HUMAN NECESSITIES
    • A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61C—DENTISTRY; APPARATUS OR METHODS FOR ORAL OR DENTAL HYGIENE
    • A61C17/00—Devices for cleaning, polishing, rinsing or drying teeth, teeth cavities or prostheses; Saliva removers; Dental appliances for receiving spittle
    • A61C17/16—Power-driven cleaning or polishing devices
    • A61C17/22—Power-driven cleaning or polishing devices with brushes, cushions, cups, or the like
    • A61C17/32—Power-driven cleaning or polishing devices with brushes, cushions, cups, or the like reciprocating or oscillating
    • A61C17/34—Power-driven cleaning or polishing devices with brushes, cushions, cups, or the like reciprocating or oscillating driven by electric motor
    • A—HUMAN NECESSITIES
    • A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61C—DENTISTRY; APPARATUS OR METHODS FOR ORAL OR DENTAL HYGIENE
    • A61C17/00—Devices for cleaning, polishing, rinsing or drying teeth, teeth cavities or prostheses; Saliva removers; Dental appliances for receiving spittle
    • A61C17/16—Power-driven cleaning or polishing devices
    • A61C17/22—Power-driven cleaning or polishing devices with brushes, cushions, cups, or the like
    • A61C17/32—Power-driven cleaning or polishing devices with brushes, cushions, cups, or the like reciprocating or oscillating
    • A61C17/34—Power-driven cleaning or polishing devices with brushes, cushions, cups, or the like reciprocating or oscillating driven by electric motor
    • A61C17/3409—Power-driven cleaning or polishing devices with brushes, cushions, cups, or the like reciprocating or oscillating driven by electric motor characterized by the movement of the brush body
    • A61C17/3481—Vibrating brush body, e.g. by using eccentric weights
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
    • F16F—SPRINGS; SHOCK-ABSORBERS; MEANS FOR DAMPING VIBRATION
    • F16F2222/00—Special physical effects, e.g. nature of damping effects
    • F16F2222/06—Magnetic or electromagnetic
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
    • F16F—SPRINGS; SHOCK-ABSORBERS; MEANS FOR DAMPING VIBRATION
    • F16F2230/00—Purpose; Design features
    • F16F2230/0005—Attachment, e.g. to facilitate mounting onto confer adjustability

Definitions

  • the present disclosure is directed generally to an adjustable vibration absorber for a personal care device drivetrain assembly.
  • US2017100224A1 discloses a drive system for a personal-care appliance.
  • WO2016119136A1 discloses an implement for personal cleaning and care.
  • DE1812909U discloses a suspension element for parts executing rotary movements, consisting of two permanent magnet discs or rings arranged coaxially next to one another with an axis-parallel direction of magnetization and each having at least two poles on the surfaces facing one another, wherein only one of the two permanent magnet discs can be rotated in relation to the other, with the torque required for the rotation has a cushioning effect.
  • Electric personal care devices such power toothbrushes, shavers, face cleansers, and similar devices, have motor that engages a drivetrain in order to drive a head mechanism in an oscillating, reciprocating, or other pattern.
  • the devices also include a resonator, which is a component of the drivetrain that converts the oscillatory force of the motor into rotational movement.
  • the actuator force excites the resonance of the system, which ensures high rotational amplitude at low input power.
  • Some devices comprise a mechanical resonator, which includes a mechanical spring. Together with the inertia of the system, the mechanical spring defines the natural frequency of the system.
  • Other devices comprise a magnetic resonator, which includes a magnetic spring. The magnetic spring attracts iron in the actuator, and the magnitude of attraction is related to the distance between the magnet and the iron, creating a magnetic equivalent to a mechanical spring. Together with the driven inertia, the magnetic spring defines the natural frequency of the system.
  • resonant actuators can transfer unwanted vibrations to the handle of the personal care device that can be felt by users in operation, and can be perceived as unwanted
  • many personal care devices utilize vibration cancellation. For example, some motors are suspended or otherwise engaged with springs to cancel vibrations.
  • these vibration cancellation methods add complexity to the personal care device, and do not adjust to the unique operating frequency of each individual personal care device, thereby decreasing the effectiveness of the cancellation.
  • the present disclosure is directed to inventive vibration reduction assemblies comprising an adjustable vibration absorber.
  • inventive systems Applied to a powered personal care device such as an electric toothbrush, face cleanser, or shaver, the inventive systems provide a vibration reduction assembly capable of adjusting to the unique operating frequency of the device, thereby reducing unwanted vibration.
  • the vibration reduction assembly comprises a first component having a radial magnetization pattern of alternating poles, and a second component comprising a ferromagnetic material with a radial pole structure to form a vibration cancellation mechanism for the resonant system.
  • the first component and the second component are separated by an air gap having an adjustable distance, where adjusting the air gap adjusts or fine tunes the stiffness of the rotational magnet and thus adjusts or fine tunes the vibration cancellation mechanism.
  • the vibration reduction assembly comprises an adjustment mechanism configured to adjust the first distance.
  • a particular goal of utilization of the embodiments and implementations herein is to provide an assembly for an oral cleaning device such as, e.g., a Philips Sonicare TM toothbrush, although the assembly may be utilized with many other personal care devices, including tongue scrapers, flossers, shavers, face cleansers, and many other devices.
  • an oral cleaning device such as, e.g., a Philips Sonicare TM toothbrush
  • the assembly may be utilized with many other personal care devices, including tongue scrapers, flossers, shavers, face cleansers, and many other devices.
  • a personal care device 10 that includes a housing portion 12 and a head member 14 mounted on the housing portion 12.
  • Head member 14 is mounted so as to be able to move relative to the housing portion 12.
  • the movement can be any of a variety of different movements, including oscillation, vibration, or rotation, among others.
  • the head member 14 can be fixedly mounted onto housing portion 12, or it may alternatively be detachably mounted so that head member 14 can be replaced with a new one when a component of the head member is worn out and require replacement.
  • the housing portion 12 contains a movement generator 22 for generating movement and a transmission component 240, or shaft, for transmitting the generated movements to head member 14.
  • the movement generator 22 can comprise a drivetrain, a motor or electromagnet(s) that generates movement of a shaft 240, which is subsequently transmitted to the head member 14.
  • Movement generator 22 can include components such as a power supply, an oscillator, and one or more electromagnets, among other components.
  • the power supply can comprise one or more rechargeable batteries, not shown, which can, for example, be electrically charged in a charging holder in which personal care device 10 is placed when not in use.
  • the housing portion 12 further contains a vibration reduction assembly 200 comprising an adjustable vibration absorber configured to reduce unwanted vibration.
  • the housing portion 12 is further provided with a user input 26 to activate and deactivate movement generator 22.
  • the user input 26 allows a user to operate the personal care device 10, for example to turn the personal care device 10 on and off.
  • the user input 26 may, for example, be a button, touch screen, or switch.
  • Vibration reduction assembly 200 comprises a first component 210 having a radial magnetization pattern of alternating poles 230.
  • the first component 210 has a magnetized side 212 with the radial magnetization pattern of alternating poles, and a reverse side 214.
  • the vibration reduction assembly further includes a second component 220 comprising a ferromagnetic material with a radial pole structure.
  • the second component 220 has a first side 222 and a reverse side 224, where at least the first side comprises a ferromagnetic material with a radial pole structure.
  • the vibration reduction assembly further comprises a shaft 240 surrounded by an adjustment mechanism 250 to allow for adjustment of the distance between the first component and the second component.
  • the shaft 240 is adjustably connected by the adjustment mechanism 250 to the second component 220.
  • the adjustment mechanism 250 comprises a plurality of ball bearings 252 or leaf springs, as shown in FIG. 3 , which facilitate the connection between the second component 220 and the shaft 240.
  • an adjustment mechanism 250 comprising ball bearings 252
  • the attractive force between magnets and poles provides a pre-load that prevents a rattling of the ball bearing.
  • the second component 220 may also comprise a plurality of extensions 260 extending from the first side 222 toward the magnetized side 212 of first component 210. Although shown as circular in FIG. 2 , first component 210 and/or second component 220 can be a variety of shapes and sizes.
  • Vibration reduction assembly 200 comprises a first component 210 with a magnetized side 212 with a radial magnetization pattern of alternating poles, and a reverse side 214.
  • the first component 210 comprises or defines an opening 216, as shown in FIG. 4 , that allows the shaft 240 to traverse the component.
  • the vibration reduction assembly 200 further includes a second component 220 comprising a ferromagnetic material with a radial pole structure.
  • the second component 220 has a first side 222 and a reverse side 224, where at least the first side comprises a ferromagnetic material with a radial pole structure.
  • the first side 222 of the second component 220 faces the magnetized side 212 of the first component 210.
  • the vibration reduction assembly comprises a shaft 240 which is adjustably connected by the adjustment mechanism 250 to the second component 220.
  • the second component may also comprise a plurality of extensions 260 extending from the first side 222 toward the magnetized side 212 of first component 210.
  • the magnetized side 212 of first component 210 and the first side 222 of the second component 220 are positioned opposite each other, or facing each other.
  • the two components are positioned with an air gap 280 having a first distance between side 212 of first component 210 and first side 222 of the second component 220.
  • the first distance of the air gap can be increased or decreased by moving the first component 210 and/or the second component 220 relative to the other. As the air gap decreases, and side 212 of first component 210 approaches first side 222 of the second component 220, the magnetic attracting and repelling forces are greater and the vibration absorption is greater.
  • Fine-tuning the size of the air gap provides the fine-tuning capability of the vibration absorption system described or otherwise envisioned herein.
  • the size of the air gap can be adjusted many different ways, including but not limited to moving the first component 210 along the shaft 240 closer to or further away from the second component 220, and/or moving the second component 220 closer to or further away from the first component 210.
  • the first component comprises a radial magnetization pattern of alternating poles 230, where every other one of the poles 232 are a first magnetic pole, and the alternating poles 234 are the opposite magnetic pole.
  • poles 232 may be a north pole
  • poles 234 may be a south pole, and vice versa.
  • the poles 230 may be any shape or size, including square, round, triangular, rectangular, or any other shape or size.
  • the vibration reduction assembly further comprises a shaft 240 which is adjustably connected by an adjustment mechanism 250 to the second component 220.
  • the extensions 260 extending from the first side 222 of the second component 220 which comprise a ferromagnetic material, align with the alternating poles 230 of the first component 210 such that attracting and repelling forces provide vibration absorption.
  • FIG. 6 in one embodiment, is a schematic representation of magnetized side 212 of first component 210 with alternating poles 232, 234, with just the extensions 260 of the second component 220 shown in overlay. Although not shown in the figure, side 212 of first component 210 is separated from extensions 260 of second component 220 by air gap 280.
  • each of the extensions 260 of second component 220 is aligned approximately between a set of alternating poles 232 and 234. This provides attracting and repelling forces to provide vibration absorption.
  • the second component 220 will oscillate back and forth, causing the extensions 260 to oscillate back and forth. Since the first component is fixed in place, each of the extensions 260 will interact with the closest pole 230, which will attract or repel the extension.
  • the second component 220 has rotated toward the left, and the plurality of extensions 260 are rotated closer to poles 234 where the pole will have an attracting or repelling magnetic force on the extension.
  • FIG. 7 the second component 220 has rotated toward the left, and the plurality of extensions 260 are rotated closer to poles 234 where the pole will have an attracting or repelling magnetic force on the extension.
  • the pole structure comprises a resonance frequency that can be utilized to minimize unwanted vibrations.
  • FIG. 9 in one embodiment, is a schematic representation of a personal care device 10 with a vibration reduction assembly 200 comprising a first component 210, a second component 220, and an adjustment mechanism 250.
  • the shaft 240 is adjustably connected to the second component 220, and the second component 220 comprises a plurality of extensions 260 which face the magnetized side 212 of the first component 210. Side 212 of the first component 210 is separated by a gap 280 from the second component 220.
  • First component 210 is fixedly attached to the housing portion 12 .
  • the adjustment mechanism 250 may comprise an actuator which is activated by the user to release the force exerted by the ball bearings on the shaft, and thus the second component is free to slide along the shaft.
  • the adjustment mechanism 250 may comprise a series of pre-set positions such that the user can move the actuator from one pre-set position to another pre-set position, with the second component moving either closer to or away from the first component.
  • adjustment mechanism 250 may adjust the placement of the first component relative to the second component.
  • the adjustment mechanism 250 may comprise any internal manipulator which can be part of a user interface. The system can communicate to the user a need to adjust the system through vibration levels, and the device can be adjusted while running at the same brushing amplitude.
  • first component 210 and second component 220 are possible.
  • FIG. 10 is an embodiment of personal care device 10 with first component 210 and second component 220.
  • the shaft 240 does not traverse the first component 210.
  • second component 220 comprises a plurality of ferromagnetic extensions 260, these extensions face the bottom 310 of the device rather than facing the top 320 of the device as shown in FIG. 9 .
  • the magnetized face of the first component 210 faces the top 320 of the device so that the ferromagnetic extensions 260 of second component 220 face the magnetized face of the first component 210.
  • the movement generator and vibration reduction mechanism is shown positioned in approximately the same place in the figures, the movement generator and vibration reduction mechanism can be positioned anywhere within the handle where it is convenient, where the air gap can be adjusted, and/or where placement is most effective at minimizing vibration. Vibration reduction functions regardless of the position of the vibration reduction mechanism in the housing, as long as the rotation axis is parallel to the rotation axis of the main movement of the toothbrush.
  • the resonator has resonance frequency of 257 Hz, which is the same as the oscillation frequency of the brush. This reduces handle vibration and, unexpectedly, also increases oscillation of the brush. According to an embodiment, vibration reduction is maximized when the damping in the resonator system is as low as possible. This may be achieved, for example, using lamellated iron, or a sintered structure with the grains electrically isolated. Internal losses by eddy currents are minimized, as is the damping of the motion.
  • the phrase "at least one,” in reference to a list of one or more elements, should be understood to mean at least one element selected from any one or more of the elements in the list of elements, but not necessarily including at least one of each and every element specifically listed within the list of elements and not excluding any combinations of elements in the list of elements.
  • This definition also allows that elements may optionally be present other than the elements specifically identified within the list of elements to which the phrase "at least one" refers, whether related or unrelated to those elements specifically identified.

Landscapes

  • Engineering & Computer Science (AREA)
  • Health & Medical Sciences (AREA)
  • General Engineering & Computer Science (AREA)
  • Physics & Mathematics (AREA)
  • Animal Behavior & Ethology (AREA)
  • General Health & Medical Sciences (AREA)
  • Public Health (AREA)
  • Veterinary Medicine (AREA)
  • Life Sciences & Earth Sciences (AREA)
  • Dentistry (AREA)
  • Epidemiology (AREA)
  • Acoustics & Sound (AREA)
  • Aviation & Aerospace Engineering (AREA)
  • Electromagnetism (AREA)
  • Mechanical Engineering (AREA)
  • Brushes (AREA)
  • Vibration Prevention Devices (AREA)
  • Percussion Or Vibration Massage (AREA)

Claims (11)

  1. Ensemble de réduction de vibrations (200) d'un dispositif de soins personnels (10), l'ensemble de réduction de vibrations (200) comprenant :
    un premier composant (210) présentant une première face (212) comprenant une pluralité d'aimants (230), dans lequel la pluralité d'aimants est positionnée pour alterner entre un aimant présentant un premier pôle magnétique (232) sur la première face et un aimant présentant le pôle magnétique opposé (234) sur la première face ;
    un second composant (220) présentant une première face (222) comprenant une pluralité d'extensions ferromagnétiques (260), dans lequel la première face (212) du premier composant (210) est séparée de la première face (222) du second composant (220) par un espace (280) présentant une première distance qui est réglable, dans lequel le premier composant et le second composant sont positionnés de telle sorte qu'une paire de la pluralité d'aimants interagissent par force magnétique avec l'une respective des extensions ferromagnétiques pour réduire les vibrations d'un générateur de mouvement (22) vers une partie de boîtier (12) du dispositif de soins personnels ; et
    un mécanisme de réglage (250) configuré pour régler la première distance.
  2. Ensemble de réduction de vibrations selon la revendication 1, comprenant en outre un arbre (240), le premier composant (210) et le second composant (220) étant positionnés le long de l'arbre.
  3. Ensemble de réduction de vibrations selon la revendication 2, dans lequel le second composant est positionné de manière réglable le long de l'arbre.
  4. Ensemble de réduction de vibrations selon la revendication 2, dans lequel le premier composant est positionné de manière réglable le long de l'arbre.
  5. Ensemble de réduction de vibrations selon la revendication 1, dans lequel les premier et second composants sont sensiblement ronds.
  6. Ensemble de réduction de vibrations selon la revendication 5, dans lequel la pluralité d'aimants sont positionnés à peu près également espacés dans un cercle sur la première face du premier composant.
  7. Ensemble de réduction de vibrations selon la revendication 5, dans lequel la pluralité d'extensions ferromagnétiques sont positionnées à peu près également espacées dans un cercle sur la première face du second composant.
  8. Ensemble de réduction de vibrations selon la revendication 1, dans lequel le mécanisme de réglage est configuré pour être réglable par un utilisateur du dispositif de soins personnels.
  9. Dispositif de soins personnels (10), comprenant :
    une partie de boîtier (12) contenant un ensemble de réduction de vibrations (200) selon l'une quelconque des revendications précédentes.
  10. Dispositif de soins personnels selon la revendication 9, dans lequel le premier composant est monté sur la partie de boîtier.
  11. Dispositif de soins personnels selon la revendication 9, dans lequel la pluralité d'extensions ferromagnétiques sont positionnées à peu près également espacées dans un cercle sur la première face du second composant.
EP18749319.2A 2017-07-31 2018-07-25 Amortisseur de vibration ajustable pour appareil de soins personnels Active EP3661453B1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
US201762539006P 2017-07-31 2017-07-31
PCT/EP2018/070115 WO2019025249A1 (fr) 2017-07-31 2018-07-25 Absorbeur ajustable de vibrations destiné à un dispositif de soins personnels

Publications (3)

Publication Number Publication Date
EP3661453A1 EP3661453A1 (fr) 2020-06-10
EP3661453B1 true EP3661453B1 (fr) 2025-11-19
EP3661453C0 EP3661453C0 (fr) 2025-11-19

Family

ID=63079896

Family Applications (1)

Application Number Title Priority Date Filing Date
EP18749319.2A Active EP3661453B1 (fr) 2017-07-31 2018-07-25 Amortisseur de vibration ajustable pour appareil de soins personnels

Country Status (6)

Country Link
US (1) US11454294B2 (fr)
EP (1) EP3661453B1 (fr)
JP (1) JP7129467B2 (fr)
CN (1) CN111148481B (fr)
RU (1) RU2020108810A (fr)
WO (1) WO2019025249A1 (fr)

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US12616561B2 (en) 2024-01-26 2026-05-05 Water Pik, Inc. Vibration isolator for oral irrigators

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JP2020528985A (ja) 2020-10-01
US20200232535A1 (en) 2020-07-23
RU2020108810A3 (fr) 2021-12-15
RU2020108810A (ru) 2021-09-02
CN111148481A (zh) 2020-05-12
CN111148481B (zh) 2022-11-18
EP3661453A1 (fr) 2020-06-10
WO2019025249A1 (fr) 2019-02-07
EP3661453C0 (fr) 2025-11-19
US11454294B2 (en) 2022-09-27
JP7129467B2 (ja) 2022-09-01

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